| Description |
Western equine encephalomyelitis (WEE) is a potentially fatal mosquito-borne disease that affects equids (horses, mules, donkeys & zebras) and humans. Disease has mostly been reported in the Americas, where birds and mosquitoes are considered the principal reservoir of infection. WEE causes disease in humans, causing flu-like symptoms or neurological disease, with occasional human fatalities reported. A vaccine is available for equines. |